Just look around a bit (The search function is your friend here).
The vast majority of intakes here are home-made (aside from the FWI'* used on newer Bonnies from Intense.
The usual filter of choice is a K&N cone filter RX-4750. Make sure you get a good filter, instead of a cheap knock-off. You get what you pay for. The pipe is usually found at AutoZone as a generic pipe that needs to be modified to fit. Along with that you'll need a coupler to attach the intake to the throttle body.
Just look around, and you'll find all the gory details. If not, just come back and ask specifics.
^^^I guess this'll have to do till I get another Bonne^^^
Every time you do a burnout, god kills a Prius